JavaScript Math cbrt() Method

The Math.cbrt() method is used to find the cube root of a number. 

Syntax:

Math.cbrt(x)

Parameters: This method accepts a single parameter as mentioned above and described below:

• x: This parameter is simply a number whose cube root needs to be found.

Returns: It returns the cube root of the given number.

Example: Below is an example of the Math.cbrt() Method.

javascript

console.log("cbrt of 64 : "
    + Math.cbrt(64));
console.log("cbrt of 27: "
    + Math.cbrt(27));
console.log("cbrt of 0: "
    + Math.cbrt(0));
console.log("cbrt of -1: "
    + Math.cbrt(-1));
console.log("cbrt of -27: "
    + Math.cbrt(-27));
console.log("cbrt of Infinity : "
    + Math.cbrt(Infinity));

Output

cbrt of 64 : 4
cbrt of 27: 3
cbrt of 0: 0
cbrt of -1: -1
cbrt of -27: -3
cbrt of Infinity : Infinity

Example: Here cube root of 8 is calculated to 2 because when any 3 times repeated any number is present inside of the cube root then only one number is taken out as the value of the cube root. ∛8 = ∛2*2*2 = 2

Javascript

console.log("cbrt of 8 : "
    + Math.cbrt(8));

Output

cbrt of 8 : 2

Example: Errors and Exceptions, it is an error case because the cube root of a complex number can not be found which is why its parameter gives an error. 

javascript

// Cube root of complex number can
// not be calculated.
console.log("cbrt of Complex no : "
    + Math.cbrt(1 + 2i));

Output:

Error: Invalid or unexpected token

Example: The cube root of the string can not be found which is why the string parameter of the function gives NaN i.e., not a number. Only integer value can be used as the parameter for the function. 

javascript

// Only number can be used as the parameter
// here string as parameter gives NaN i.e,
// not a number.
console.log("cbrt of a string : "
    + Math.cbrt("gfg"));

Output:

cbrt of a string: NaN

Example: Whenever we need to get the cube root of any number that time we take the help of the Math.cbrt() function in JavaScript. 

javascript

// Here the Math.cbrt() function
// calculates cube root for
// different numbers taken as
// function's parameter.
console.log("Output : "
    + Math.cbrt(125));
console.log("Output : "
    + Math.cbrt(23));

Output:

Output : 5
Output : 2.8438669798515654

We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.

Supported Browsers:

• Google Chrome 38.0
• Firefox 25.0
• Opera 25.0
• Safari 8.0